I thought I was over it

The hijacking that is. It's been 18 months and you'd think I wouldn't be having issues. But I am. I went to the local mall yesterday morning, just an average grocery run, nothing special. I parked, went in and paid for everything I wanted. When I came out to the car, I hesitated. Right next to my car was a ute with 3 young black men sitting in the open back. It took me probably all of 5 minutes to unload the cart and get into the car, all while my heart was beating up in my throat. I kept expecting them to jump out and do something, anything. Instead, they sat there talking quietly to each other while I had a mini breakdown. I felt ill when I got home.